Process for producing plates, films, or pellicles detachably secured to a paper backing or the like.



. i an s'ra s irinrr'r carica.

JULES BLONDEL AND ALEXIS CHOPIN, OF PARIS, FRANCE. I

PROCESS FOR PRODUCING PLATES, FILMS, OR PELLICLES DETACHABLY SECURED T0 A PAPER BACKING 0R THE LIKE.

To all whom it may concemk v Be it known that we, JULES BLONDEL and ALExis CHoriN, citizens of the Republic of France, and resident in Paris, France, have iiivented new and useful Improvements in Processesfor Producing vl)late: sgFilms, or Pellicles Detachably Secured to a Paper Backing or the like, of which the following is a specification. i

This invention relates to a `recess for the manufacture of photograp ic plates, kinematograph films, both positives and negatives, coated papers, and so forth by a method simple, easy and inexpensive and which possesses the various advantages of the ordinary plates and films. Attempts have already been made to form into films, substances such as gelatin for instance, by depositing it upon a support previously coated with an insulating material, but these attempts have given no practical result hitherto by reason of the serious drawbacks which are experienced during the v photographic treatment.

LIn'conformit with the present invention the material w iich forms the plate or film, suchv as gelatin or other suitable substance, preferably of non-infiammable material, is

spread upon a support to .which it adheresA at its edges, but in such a'manner that it can be easily separated from the saidsupport after having undergone the usual photogi'aphic treatment. For this purpose, `use is made of a non-adhesive .or sepa-rating substance placed between the support and the material forming the plate, fi m or .coated paper; and there are contrived upon the support between the said plates or films, in-

termediate spaces upon which the materialk forniinqthem will adhere when once placed upon t ie support, so-as tokeep in position during the photographic operations while the plates orv films themselves do not posi- 'tively adhere to the support.v

With these and other objects in view we have illustrated in the accompanying draw' -mg by way of example a product of the process.

Figure 1 showsa 'top plan view of a fragment of the strip of pa er coated at various portions with -a non-a hesive materialand covered-by another Astrip. Fig. 2 isa section on line 2--2 of Fi 1. According to one orm of this process,

Specification of'Letters vPatent. l 'Patented July 28, 1914.

`Application led March 17, 1913. SerialNo. 754,949.

the support 3 of paper in sheets or endless bands is first coated with the non-adhesive or separating material 4, for instance with a Solution of wax at the parts destined to receive subsequently `the material forming the plate or film 5 or the paper coating. Between each of the parts arranged to receive the said plates or films, there are arranged' invterniediate spaces 6, not waxed, leaving the.

paperuncovered, upon which 1n consequence -are detached along the middle of the parts 6 which are not waxed; the operator then proceeds with the ordinary photographic cperations and all the parts of the film rest'- .ing upon the non-adhesive material placed`- between the gelatin and its support are then detached after the adhesive edges have been cut off.

It is obvious that instead of using a single support for a certain number `of plates or films, one might also, without exceeding thel scope ofv this `invention, make use of `separate supports of the shape and dimensions of the plates or films, that is to say, representing in the form previously described, the parts waxed and connecting all these parts together with the supports representing the parts which are not waxed.

Having now described our said invention, we declare that what we 'claim is: v A method Aof making plates or fihns, which consists of coating a support at certain portions with a' substance which is non-adhesive with respect tothe film material, leaving',

interspaces between "said portions and applying the film material over said non-adhesive material and inter'spaces.'

In testimony whereof we affix our-signatures in presence of two witnesses.

' JULES BLONDEL.

,- ALEXIS CHOPIN.

Witnesses:

LomN MDMMINGER, EDWARD WOLF. v 

